Bring the water to a boil and add chopped tomatoes and onion. Bring to a boil and cook until tomatoes are soft. Remove from heat and cool until lukewarm. Puree in a blender (if you have a small blender, puree in two batches) until smooth. Return to pan and bring to a boil. Add the grated carrots and the spices and basil. Add the sliced mushrooms 5 minutes before serving, or use as a garnish on top with a sprig of parsley. Per serving (2 per batch): Calories: 79.8 Protein: 3.185 Fiber: 7.72 Carbohydrates: 18.345 Fat: .53